INDIANA ACCREDITED HORTICULTURE INITIAL EXAM
WITH ANSWERS #8
____________ Are submicroscopic particles that require a cell of a living host in which
to reproduce. - correct answer viruses
The suppression of growth of lateral buds behind the shoot tip is controlled by auxin.
This phenomenon is called: - correct answer apical dominance
The disease triangle involves 3 factors - correct answer susceptible host, pathogen and
favorable environment
Photosynthesis provides the __________ for plant growth. - correct answer energy
In the nonmenclature for cornus florida f. Rubra 'cherokee cheif', which word or phrase
represents the cultivar name? - correct answer 'cherokee cheif'
Water vapor moves out of a leaf through holes that can be opened and closed by the
plant. What are these openings called? - correct answer stomata
When exclusive rights are granted for 20 years to commercially grow or sell a newly
discovered or developed plant cultivar, the person or parties given these rights is said to
hold a ____________. - correct answer patent
The binomial nomenclature we use today was first discovered by __________. - correct
answer carolus linnaeues
The iah manual lists five critical issues that should always be considered when selecting
a plant for the landscape. Which of the following correctly shows that list? - correct
answer 1) esthetics 2) adaptation 3) function 4) maintenance 5) cost
When diagnosing a plant disorder, the symptoms define the changes in the affected
plant's _____________ in response to the problem. - correct answer appearance &
growth (a&c only)
As a reflection of the genetic diversity available, the number of useful cultivars (or
varieties) for each species could be categorized as none, limited or many. - correct
answer true
A plant categorized as requiring full sun indicates that the plant requires at least twelve
hours of direct sun per day. - correct answer false
The united states department of agriculture (usda) hardiness zones established by the
u.s. national arboretum describe the average coldest temperature in winter. - correct
answer true
, Ornamental grasses require more extensive soil preparation for healthy growth than do
most other ornamentals - correct answer false
The best timing for cutting back ornamental grasses is _________________. - correct
answer early spring
The optimum ph of soil for annuals is between 6.0 and 7.0. - correct answer true
Most ornamental grasses grow best in partial to all-day shade. - correct answer false
Which of the following is not a common landscape function of annual flowers? - correct
answer erosion control
An important key to successful culture of hardy bulbs is to be sure soil conditions
provide adequate: - correct answer drainage
Removal of old flowers to prevent seed formation or to improve plant appearance is
called: - correct answer dead-heading
Bacteria cause many abiotic diseases - correct answer false
Fourteen essential plant nutrients come as minerals from the soil. Which three come
from the air and water? - correct answer carbon, hydrogen, oxygen
An important soil characteristic that affects nutrient solubility and thus uptake of charged
mineral particles by plant roots is ___________________. - correct answer ph
Large pore spaces in a soil usually contain ________ white small ones often contain
_____________. - correct answer air/ water
Two factors that impact fungicide application frequency are: - correct answer plant
growth and rainfall
The texture of a soil is a description of it's: - correct answer particle size
One of the most economical ways to apply fertilizer to landscape plants is the use of
fertilizer spikes. - correct answer false
Low soluble salts in a growing medium can be harmful to plant health, but high soluble
salts is not a problem to worry about. - correct answer false
An important soil characteristic that determines a soil's ability to hold charged mineral
particles so they are available to plant roots is _______________. - correct answer cec
WITH ANSWERS #8
____________ Are submicroscopic particles that require a cell of a living host in which
to reproduce. - correct answer viruses
The suppression of growth of lateral buds behind the shoot tip is controlled by auxin.
This phenomenon is called: - correct answer apical dominance
The disease triangle involves 3 factors - correct answer susceptible host, pathogen and
favorable environment
Photosynthesis provides the __________ for plant growth. - correct answer energy
In the nonmenclature for cornus florida f. Rubra 'cherokee cheif', which word or phrase
represents the cultivar name? - correct answer 'cherokee cheif'
Water vapor moves out of a leaf through holes that can be opened and closed by the
plant. What are these openings called? - correct answer stomata
When exclusive rights are granted for 20 years to commercially grow or sell a newly
discovered or developed plant cultivar, the person or parties given these rights is said to
hold a ____________. - correct answer patent
The binomial nomenclature we use today was first discovered by __________. - correct
answer carolus linnaeues
The iah manual lists five critical issues that should always be considered when selecting
a plant for the landscape. Which of the following correctly shows that list? - correct
answer 1) esthetics 2) adaptation 3) function 4) maintenance 5) cost
When diagnosing a plant disorder, the symptoms define the changes in the affected
plant's _____________ in response to the problem. - correct answer appearance &
growth (a&c only)
As a reflection of the genetic diversity available, the number of useful cultivars (or
varieties) for each species could be categorized as none, limited or many. - correct
answer true
A plant categorized as requiring full sun indicates that the plant requires at least twelve
hours of direct sun per day. - correct answer false
The united states department of agriculture (usda) hardiness zones established by the
u.s. national arboretum describe the average coldest temperature in winter. - correct
answer true
, Ornamental grasses require more extensive soil preparation for healthy growth than do
most other ornamentals - correct answer false
The best timing for cutting back ornamental grasses is _________________. - correct
answer early spring
The optimum ph of soil for annuals is between 6.0 and 7.0. - correct answer true
Most ornamental grasses grow best in partial to all-day shade. - correct answer false
Which of the following is not a common landscape function of annual flowers? - correct
answer erosion control
An important key to successful culture of hardy bulbs is to be sure soil conditions
provide adequate: - correct answer drainage
Removal of old flowers to prevent seed formation or to improve plant appearance is
called: - correct answer dead-heading
Bacteria cause many abiotic diseases - correct answer false
Fourteen essential plant nutrients come as minerals from the soil. Which three come
from the air and water? - correct answer carbon, hydrogen, oxygen
An important soil characteristic that affects nutrient solubility and thus uptake of charged
mineral particles by plant roots is ___________________. - correct answer ph
Large pore spaces in a soil usually contain ________ white small ones often contain
_____________. - correct answer air/ water
Two factors that impact fungicide application frequency are: - correct answer plant
growth and rainfall
The texture of a soil is a description of it's: - correct answer particle size
One of the most economical ways to apply fertilizer to landscape plants is the use of
fertilizer spikes. - correct answer false
Low soluble salts in a growing medium can be harmful to plant health, but high soluble
salts is not a problem to worry about. - correct answer false
An important soil characteristic that determines a soil's ability to hold charged mineral
particles so they are available to plant roots is _______________. - correct answer cec
